Hey can we run after effects cc 2019 smoothly on 8 gb ram computer?

hey does after effects cc 2019 runs smoothly on 8 gb ram and an intel 8th gen i5 processor?

you should be fine if you give AE 6gigs of ram, and set your preview quality to half. raising disk cache space helps too in preferences > memory

Yes. You can turn on/off some settings to improve performance.